CN212203255U

CN212203255U - Vacuum check valve and valve core

Info

Publication number: CN212203255U
Application number: CN202020541557.7U
Authority: CN
Inventors: 付金木; 蔡欢
Original assignee: Hangzhou Youjia Automation Technology Co Ltd
Current assignee: Hangzhou Youjia Automation Technology Co Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-12-22
Anticipated expiration: 2030-04-14

Abstract

The utility model relates to the technical field of valves, the purpose is that it can't realize the problem of normal non return function under little flow, multi-angle use operating mode to solve current vacuum chuck check valve. In particular to a vacuum check valve, which comprises a valve body and a valve core arranged in the valve body, wherein the valve core consists of a core shell, a sealing block, a guide limit pin and a return spring; the core shell cooperation is at the inner chamber of valve body, direction spacer pin and core shell sliding fit to freely slide along the axial of core shell, the one end system of direction spacer pin has the location shaft shoulder, and the other end stretches out behind the core shell with a sealing piece fixed connection, and reset spring overlaps and establishes between sealing piece and the core shell, has the fitting surface between sealing piece and the core shell.

Description

Vacuum check valve and valve core

Technical Field

The utility model belongs to the technical field of the valve technique and specifically relates to a vacuum check valve and case.

Background

The vacuum chuck mechanical arm is common automation equipment in modern industrial manufacturing, is widely applied to industries such as automobiles, electronics, semiconductors, new energy, sheet metals, woodwork, glass, intelligent storage logistics, robot stacking and unstacking and the like, and realizes the suction and the transportation of sucked objects such as glass, chips, lithium batteries, sheet metal parts, express boxes and the like. The main principle is as follows: the vacuum device sucks the object to be sucked, negative air pressure is generated in the sucking disc, so that the object to be sucked is firmly sucked, and the object to be sucked is conveyed along with the movement of the manipulator. When the article to be sucked is conveyed to the target position, the air is inflated into the vacuum sucker, so that the negative air pressure in the vacuum sucker is changed into zero air pressure or slightly positive air pressure, the vacuum sucker is separated from the article to be sucked, and the task of lifting and conveying the article to be sucked is completed.

The vacuum chuck of vacuum chuck manipulator usually carries out array layout or non-array layout in certain size range, because the absorption face size of the article of getting of different specifications is different to two kinds of situations can appear: firstly, when all vacuum chucks of the manipulator are adsorbed on the sucked object, all the vacuum chucks are vacuumized, and a vacuum system of the manipulator establishes negative pressure and finishes carrying; when only part of the suckers of the manipulator are adsorbed on the sucked object, the vacuum suckers which are not adsorbed on the sucked object are in a vacuum breaking state, the suckers need to be stopped, otherwise, a vacuum system of the manipulator cannot establish negative pressure, and the manipulator cannot normally work.

The existing vacuum check valve mainly has the following two structures:

first, the valve core adopts the ball structure, when the sucking disc is not contacted with the suction object or not well contacted, one side of the valve core continuously generates vacuum to cause different pressures at two sides of the valve core, and atmospheric pressure pushes the valve core plugging piece (namely the ball) to the forming matching step to realize the plugging of the air passage. The drawbacks of such check valve constructions are: the sucking disc is not supported and the operating mode of sucking disc at the wide-angle slope is used, more can't use when the sucking disc is up because when the big-angle slope of sucking disc or when up, case shutoff piece can fall into the cooperation step owing to the dead weight, can't independently open, causes the sucking disc to absorb the inefficacy.

The second type, case adopt elastic diaphragm non return structure, and this type of structure is fixed the diaphragm in one side of air flue, when the sucking disc not with absorb the thing contact or not well contact, because the diaphragm both sides pressure differential reason, the diaphragm is pushed to the air flue and is stopped the air flue shutoff. The drawbacks of such structures are: the good air passage drift diameter in normal work needs to be ensured, the diaphragm and the air passage cannot form a large angle, otherwise, the drift diameter of the air passage is reduced, the diaphragm can be started to be plugged by the structural characteristics needing larger flow, and the vacuum generating device selects high power and constantly keeps large flow working condition, so that the production cost is increased.

Disclosure of Invention

The utility model aims at overcoming not enough among the above-mentioned background art, provide a vacuum check valve and case, solve the problem that current vacuum chuck check valve can't realize normal non return function under little flow, multi-angle use operating mode.

The utility model discloses a first technical scheme is: a vacuum check valve comprises a valve body and a valve core arranged in the valve body, wherein the valve core consists of a core shell, a sealing block, a guide limit pin and a return spring; the core shell cooperation is at the inner chamber of valve body, direction spacer pin and core shell sliding fit to freely slide along the axial of core shell, the one end system of direction spacer pin has the location shaft shoulder, and the other end stretches out behind the core shell with a sealing piece fixed connection, and reset spring overlaps and establishes between sealing piece and the core shell, has the fitting surface between sealing piece and the core shell.

As a further scheme, the sealing block is in conical surface fit with the core shell.

As a further scheme, the seal block is provided with an overflow hole, and the overflow hole runs through to one side that the seal block deviates from the core shell from one side that the seal block faces the core shell, and staggers with the fitting surface of the seal block.

As a further scheme, the outer wall of the core shell is in interference fit with the inner cavity of the valve body, a guide sleeve for guiding the guide limiting pin is arranged at the axis position of the inner hole of the core shell, and the guide sleeve and the core shell are connected into a whole through a plurality of spokes.

As a further scheme, both ends of the valve body are provided with internal threads and external threads.

As a further scheme, two ends of the valve body are respectively provided with a sealing ring.

The second technical scheme of the invention is as follows: a valve core of a vacuum check valve comprises a core shell, a sealing block, a guide limit pin and a return spring; the guide limiting pin is in sliding fit with the core shell and freely slides along the axial direction of the core shell, a positioning shaft shoulder is manufactured at one end of the guide limiting pin, the other end of the guide limiting pin extends out of the core shell and then is fixedly connected with the sealing block, the reset spring is sleeved between the sealing block and the core shell, and a matching surface is manufactured between the sealing block and the core shell.

As a further scheme, a guide sleeve for guiding the guide limiting pin is arranged at the axis position of the inner hole of the core shell, and the guide sleeve and the core shell are connected into a whole through a plurality of spokes.

Compared with the prior art, the utility model has the following advantage: the utility model can realize the non-return function of any angle of the vacuum sucker under the working condition of small flow, expand the application range of the vacuum sucker, reduce the energy consumption of the sucker when continuously working and reduce the production cost; and simultaneously, the utility model provides a check valve adopts split type design, but not only the single vacuum chuck of adaptation, the other types of utensil of inhaling of adaptation simultaneously makes to inhale the utensil and realize the vacuum suction and the non return function under the arbitrary angle equally.

Drawings

Fig. 1 is a perspective view of a vacuum check valve.

Fig. 2 is a schematic top view of a vacuum check valve.

Fig. 3 is a schematic sectional structure view a-a of fig. 2.

Fig. 4 is a sectional structural view of the valve body.

Fig. 5 is a schematic sectional view of the valve body.

Fig. 6 is a perspective view of the valve body.

Detailed Description

The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.

Example 1:

as shown in fig. 1 and 2, a vacuum check valve mainly comprises a valve body 1, a valve core 2, a first sealing ring 3 and a second sealing ring 4. As shown in FIG. 4, in order to achieve the adaptability with the existing suction cup to the maximum extent, the two ends (inlet and outlet) of the valve body are designed with four G threads, namely G1/8 internal thread 21, G1/4 external thread 22, G3/8 external thread 23 and G1/4 internal thread 24. Meanwhile, the valve body and the valve core of the vacuum check valve are designed into a split structure, and the inlet and the outlet of the vacuum check valve can be exchanged through flexible combination, so that the adaptability of the check valve is greatly improved, and the vacuum check valve can be assembled with most vacuum suckers on the market.

As shown in fig. 3, 4 and 5, the valve core 2 is composed of a core shell 31, a seal block 32, a guide limit pin 33 and a return spring 34. The sealing block 32 is fixedly connected with the guide limit pin 33 through threads to ensure good movement consistency. As shown in fig. 2, a guide sleeve 31.1 for guiding the guide limit pin 33 is arranged at the axial position of the inner hole of the core shell 31, and the guide sleeve 31.1 and the core shell 31 are connected into a whole through a plurality of spokes 31.2. One end of the guide limit pin 33 is provided with a positioning shaft shoulder 33.1, and the other end of the guide limit pin is fixedly connected with the sealing block 32 after extending out of the guide sleeve 31.1 of the core shell. The sealing block 32 is free to slide in the axial direction of the core shell 31 under the guidance of the guide limit pin 33 and the guide sleeve 31.1. The length of the guide stopper pin 33 determines the amount of clearance between the seal block 32 and the core case 31. The matching surfaces 36 of the sealing block 32 and the core shell 31 are designed to have the same taper angle, so that good sealing effect is ensured when the sealing block 32 is contacted with the core shell 31. A return spring 34 is arranged between the sealing block 32 and the core shell 31, and the spring structure can realize the separation of the sealing block 32 and the core shell 31 under the working condition of any angle, thereby ensuring the opening and closing and non-return functions of the vacuum check valve under any angle. As shown in fig. 5 and 6, the seal block 32 is provided with a spill hole 35 (preferably 0.2-1mm in diameter), and the spill hole 35 penetrates from the side of the seal block 32 facing the core casing to the side of the seal block 32 away from the core casing 31, and is staggered from the mating surface 36 of the seal block 32 as much as possible so as not to block the spill hole 35.

The working principle of the embodiment 1 is as follows: when the sucker is not in contact with a sucked object or is not in good contact with the sucked object, the vacuum generating device continuously generates vacuum, the pressures of the upper side and the lower side of the sealing block 32 are unequal, the sealing block 32 is pushed to the core shell 31 under the action of the pressure, the sealing block 32 is in conical surface fit with the core shell 31, the air passage is blocked, and therefore the non-return function is realized, and in the process, slight vacuum degree loss (less than 1%) can occur due to the existence of the overflow hole 35; when the sucker is in good contact with the sucked object, the overflow hole 35 is arranged on the sealing block 32, so that the upper and lower spaces of the sealing block 32 are connected into a whole, the same pressure is reached, the sealing block 32 is separated from the core shell 31 under the action of the return spring 34, and the vacuum sucking function is recovered. And finishing the vacuum suction and the non-return operation.

Example 2:

as shown in fig. 5 and 6, a valve body of a vacuum check valve applied to the vacuum check valve described in embodiment 1 includes a body case 31, a seal block 32, a guide stopper pin 33, and a return spring 34. The guiding limit pin 33 is in sliding fit with the core shell 31 and freely slides along the axial direction of the core shell 31, one end of the guiding limit pin 33 is provided with a positioning shaft shoulder 33.1, the other end of the guiding limit pin extends out of the core shell 31 and then is fixedly connected with the sealing block 32, the return spring 34 is sleeved between the sealing block 32 and the core shell 31, and a matching surface 36 is arranged between the sealing block 32 and the core shell 31. The core shell 31, the sealing block 32 and the guide limit pin 33 are generally made of nylon materials, and other materials can be selected according to the application occasions.

The sealing block 32 and the core shell 31 are in conical surface fit. The seal block 32 is provided with an overflow hole 35, and the overflow hole 35 penetrates from one side of the seal block 32 facing the core shell 31 to one side of the seal block 32 departing from the core shell 31 and is staggered with the matching surface 36 of the seal block. The axial position of the inner hole of the core shell 31 is provided with a guide sleeve 31.1 for guiding the guide limit pin 33, and the guide sleeve 31.1 and the core shell 31 are connected into a whole through a plurality of spokes 31.2.

The above description is only a preferred embodiment of the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a vacuum check valve, includes valve body (1) and installs case (2) in valve body (1), its characterized in that: the valve core (2) consists of a core shell (31), a sealing block (32), a guide limit pin (33) and a return spring (34); the core shell (31) is matched with an inner cavity of the valve body (1), the guide limiting pin (33) is in sliding fit with the core shell (31) and freely slides along the axial direction of the core shell (31), a positioning shaft shoulder (33.1) is arranged at one end of the guide limiting pin (33), the other end of the guide limiting pin extends out of the core shell (31) and then is fixedly connected with the sealing block (32), the reset spring (34) is sleeved between the sealing block (32) and the core shell (31), and a matching surface (36) is arranged between the sealing block (32) and the core shell (31).

2. A vacuum check valve as defined in claim 1 wherein: the sealing block (32) is in conical surface fit with the core shell (31).

3. A vacuum check valve as claimed in claim 1 or 2, wherein: the seal block (32) is provided with an overflow hole (35), the overflow hole (35) penetrates through one side of the seal block (32) departing from the core shell (31) from one side of the seal block (32) facing the core shell (31), and the overflow hole and a matching surface (36) of the seal block (32) are staggered.

4. A vacuum check valve as defined in claim 1 wherein: the outer wall of the core shell (31) is in interference fit with the inner cavity of the valve body (1), a guide sleeve (31.1) for guiding the guide limiting pin (33) is arranged at the axis position of the inner hole of the core shell (31), and the guide sleeve (31.1) and the core shell (31) are connected into a whole through a plurality of spokes (31.2).

5. A vacuum check valve as defined in claim 1 wherein: and both ends of the valve body (1) are provided with internal threads and external threads.

6. A vacuum check valve as defined in claim 1 wherein: and sealing rings are respectively arranged at two ends of the valve body (1).

7. A valve core of a vacuum check valve is characterized in that: the valve core consists of a core shell (31), a sealing block (32), a guide limit pin (33) and a return spring (34); the guide limiting pin (33) is in sliding fit with the core shell (31) and freely slides along the axial direction of the core shell (31), a positioning shaft shoulder (33.1) is arranged at one end of the guide limiting pin (33), the other end of the guide limiting pin extends out of the core shell (31) and then is fixedly connected with the sealing block (32), the reset spring (34) is sleeved between the sealing block (32) and the core shell (31), and a matching surface (36) is arranged between the sealing block (32) and the core shell (31).

8. The valve cartridge of a vacuum check valve according to claim 7, wherein: the sealing block (32) is in conical surface fit with the core shell (31).

9. The cartridge of a vacuum check valve according to claim 7 or 8, wherein: the seal block (32) is provided with an overflow hole (35), the overflow hole (35) penetrates through one side of the seal block (32) departing from the core shell (31) from one side of the seal block (32) facing the core shell (31), and the overflow hole and a matching surface (36) of the seal block (32) are staggered.

10. The valve cartridge of a vacuum check valve according to claim 7, wherein: the axial position of the inner hole of the core shell (31) is provided with a guide sleeve (31.1) for guiding the guide limit pin (33), and the guide sleeve (31.1) and the core shell (31) are connected into a whole through a plurality of spokes (31.2).